Dealing With A Boot Failure - HP Visualize J2240 Service Handbook

Dealing with a Boot Failure

To start this workstation from an operating system stored on a device different from
the usual boot device, to boot from a different disk, or to boot from another type of
device (such as a DDS tape drive), see the following situations and examples that use
the Boot Console Interface. To access the Boot Console Interface, see Chapter 9 of
this book.
D
To boot from a known device containing a bootable operating system, type the
following at the prompt:
Main Menu: Enter a command or a menu >
where device is the hardware path to the device, specified in Mnemonic Style
Notation.
For example, to boot an operating system stored on a DDS-format tape in a
drive located at ''scsi.1.0,'' go to the Main Menu of the Boot Console Interface
and then type the following command at the prompt:
Main Menu: Enter a command or a menu >
The operating system on the specified device is used to start the workstation.
D
To interact with the Initial System Loader (ISL) before booting the worksta-
tion, type the following at the prompt:
Main Menu: Enter a command or a menu >
You are prompted:
Answering yes (y) causes the ISL to be loaded from the specified device. After
a short time, the following prompt appears on the screen:
ISL>
ISL is the program that actually controls the loading of the operating system.
By interacting with ISL, you can choose to load an alternate version of the
HP-UX operating system.
For example, if the usual kernel (/stand/vmunix for 10.20) on the root disk
(fwscsi.6.0) has become corrupted, boot the workstation from the backup ker-
nel (/stand/vmunix.prev for 10.20) by typing the following at the
prompt:
ISL> hpux /stand/vmunix.prev (for 10.20)
4–6 Troubleshooting
Interact with ISL (Y or N) >
boot <device>
boot scsi.1.0
boot
<device>
y
ISL>